A micro-inertia gradient visco-elastic motivation for proportional damping

被引：5
|
作者：
Bagni, C. [1 ]
Gitman, I. [2 ]
Askes, H. [1 ]
机构：
[1] Univ Sheffield, Dept Civil & Struct Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Univ Sheffield, Dept Mech Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
JOURNAL OF SOUND AND VIBRATION | 2015年 / 347卷
基金：
英国工程与自然科学研究理事会;
关键词：
ELASTICITY; MODELS; LENGTH; DISLOCATIONS; DEFORMATION; FORMULATION; PLASTICITY; DISPERSION;
D O I：
10.1016/j.jsv.2015.02.042
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this paper, a micro-inertia gradient yisco-elasticity theory is proposed and implemented for the description of wave dispersion in periodic visco-elastic composites characterised by (stiffness-)proportional damping. An expression for the internal length parameter has been derived in terms of geometry and material properties. The theory has been validated through a numerical simulation of wave propagation in a onedimensional periodic composite bar for two different heterogeneity levels, where the proposed theory has shown good agreement with the solution obtained by explicitly modelling the material heterogeneity. The effects of both gradient enrichment and viscosity on wave propagation as well as their interaction have also been analysed. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：115 / 125
页数：11
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